1 files changed, 125 insertions, 0 deletions
diff --git a/src/wx/multiple_widget.h b/src/wx/multiple_widget.h
new file mode 100644
index 000000000..7c0b4a614
--- /dev/null
+++ b/src/wx/multiple_widget.h
@@ -0,0 +1,125 @@
+/*
+    Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifndef DCPOMATIC_MULTIPLE_WIDGET_H
+#define DCPOMATIC_MULTIPLE_WIDGET_H
+
+#include <vector>
+#include <wx/wx.h>
+#include <wx/gbsizer.h>
+#include <boost/function.hpp>
+#include "wx_util.h"
+
+template <class T>
+class MultipleWidget
+{
+public:
+	MultipleWidget (wxWindow* parent, T* wrapped)
+		: _wrapped (wrapped)
+		, _sizer (0)
+		, _button (new wxButton (parent, wxID_ANY, _("Multiple values")))
+	{
+		_button->SetToolTip (_("Click the button to set all selections to the same value"));
+		_button->Hide ();
+		_button->Bind (wxEVT_COMMAND_BUTTON_CLICKED, boost::bind (&MultipleWidget::button_clicked, this));
+	}
+
+	T* wrapped () const
+	{
+		return _wrapped;
+	}
+
+	void add (wxGridBagSizer* sizer, wxGBPosition position)
+	{
+		_sizer = sizer;
+		_position = position;
+		_sizer->Add (_wrapped, _position);
+	}
+
+	void set_single ()
+	{
+		if (_wrapped->IsShown ()) {
+			return;
+		}
+
+		_sizer->Detach (_button);
+		_button->Hide ();
+		_sizer->Add (_wrapped, _position);
+		_wrapped->Show ();
+		_sizer->Layout ();
+	}
+
+	void set_multiple ()
+	{
+		if (_button->IsShown ()) {
+			return;
+		}
+		
+		_wrapped->Hide ();
+		_sizer->Detach (_wrapped);
+		_button->Show ();
+		_sizer->Add (_button, _position);
+		_sizer->Layout ();
+	}
+
+	boost::signals2::signal<void (void)> SetAllSame;
+
+private:
+	void button_clicked ()
+	{
+		SetAllSame ();
+	}
+	
+	T* _wrapped;
+	wxGridBagSizer* _sizer;
+	wxGBPosition _position;
+	wxButton* _button;
+};
+
+
+/** Set up some MultipleWidget<SpinCtrl> using a (possibly) multiple selection of objects of type T.
+ *  The value is obtained from the T objects using getter.
+ */
+template <class T>
+void
+set_multiple (std::vector<boost::shared_ptr<T> > data, MultipleWidget<wxSpinCtrl>* widget, boost::function<int (T*)> getter)
+{
+	if (data.empty ()) {
+		widget->set_single ();
+		widget->wrapped()->SetValue (0);
+		return;
+	}
+	
+	typename std::vector<boost::shared_ptr<T> >::iterator i = data.begin();
+	int first = boost::bind (getter, data.front().get()) ();
+	while (i != data.end() && boost::bind (getter, i->get())() == first) {
+		++i;
+	}
+
+	if (i == data.end ()) {
+		/* All values are the same */
+		widget->set_single ();
+		checked_set (widget->wrapped(), first);
+	} else {
+		/* At least one different value */
+		widget->set_multiple ();
+	}
+}
+
+#endif